#biaoti{
    margin-left: 40px;
    margin-top: 30px;
    margin-bottom: 50px;
}

#zhuti{
    border: 1px solid;
    width: 80%;
    height: 450px; 
    margin-left: 40px;
    position: relative;
    background: url("login_logo.png") no-repeat left;
}
#shuru{
    position: absolute;
    width: 30%;
    right: 150px;
    bottom: 100px;
}
p{
    margin-bottom: 20px;
    font-size: 20px;
    vertical-align: middle;
}
p input{
    font-size: 20px;
}
#submit{
    text-align: center;
    font-size: 30px;
}
#reg{
    position: absolute;
    bottom: 0;
    right: 0;
    background-color: green;
    text-align: center;
    width: 150px;
    line-height: 40px;
}
#dibian{
    text-align: center;
    margin-top: 30px;
}